This product complies with the selection standards for water treatment manganese sand (JWWA A 103-3:2006-2).
We can also manufacture products with specified effective size and uniformity coefficients upon request.
Please be aware that effective size include tolerance values.

15 L PE bag, 600 L flexible container bag
*Pallet loading available upon request.
When placing your order, please specify the [Effective Size] _and [Uniformity Coefficient].
JWWA-Certified Products
We have been certified as the first factory in Japan for all filter materials (filter sand, anthracite, manganese sand, filter gravel) listed in ‘JWWA A103:2006-2 Water Supply Filter Materials.’ We contribute to safe, robust, and sustainable water supply operations.
Certified products ensure compliance with Ministry of Health Ordinances and JWWA standards, providing peace of mind!
Reduces the effort of individual quality checks by business entities!
If the pipes and others are certified products, make the heart of water purification, the filter material, certified products too!